Bombus senex Vollenhoven
Senex Vollenhoven, 1873:229

DISTRIBUTION: Sumatran Region.

Bombus supremus Morawitz
supremus Morawitz, 1887:196
linguarius Morawitz, 1890:351

DISTRIBUTION: Oriental Region.

Bombus tichenkoi (Skorikov)
[saltuarius (Skorikov, [1923]:156 [Hortobombus]) published without description]
[tichenkoi (Skorikov, [1923]:156 [Hortobombus]) published without description]
tichenkoi (Skorikov, 1926:115 [Hortobombus])
[pseudoligusticus (Skorikov, 1926:116 [Hortobombus]) infrasubspecific]
saltuarius (Skorikov, 1931:235 [Hortobombus])
sushkini (Skorikov, 1931:235 [Hortobombus]) examined
kurilensis Sakagami, 1954:92
pseudoligusticus Lelej & Kupianskaya, 2000:9

TAXONOMIC STATUS: B. sushkini and B. saltuarius have been regarded both as conspecific (Bischoff, 1936) and as separate species (Skorikov, 1931; Tkalcu, 1974a). B. saltuarius is said to be differentiated by the morphology of the male genitalia (Skorikov, 1931), although I have seen no males of this species. More evidence is awaited.

DISTRIBUTION: Palaearctic, Oriental Regions, Arctic borders.

Bombus trifasciatus Smith
trifasciatus Smith, 1852a:43, examined
wilemani Cockerell, 1911:100, examined

TAXONOMIC STATUS: This species is now recognised as a separate species from gene data by Hines & Williams (2012) and by Huang et al. (2015).

DISTRIBUTION: Oriental Region.

Bombus ussurensis Radoszkowski
Ussurensis Radoszkowski, 1877b:196
[ussuriensis Morawitz, 1881:254, incorrect subsequent spelling]

DISTRIBUTION: Oriental, Japanese, Palaearctic Regions.

Bombus eximius Smith
eximius Smith, 1852b:47, examined
latissimus Friese, 1910:405

DISTRIBUTION: Oriental Region.

Bombus festivus Smith
festivus Smith, 1861:152, examined
atrocinctus Smith in Horne, 1870:193, examined
terminalis Smith in Horne, 1870:193, examined

DISTRIBUTION: Oriental Region.

Bombus friseanus Skorikov
friseanus Skorikov, 1933a:62, examined
hönei [hoenei] Bischoff, 1936:10, examined

TAXONOMIC STATUS: B. friseanus has been considered conspecific with B. pyrosoma (Bischoff, 1936; Tkalcu, 1961b; Sakagami, 1972) and has been considered conspecific with B. pyrosoma, B. formosellus, and B. flavothoracicus (= B. miniatus) (Williams, 1991 [pdf]). From COI barcodes, these taxa appear to remain discrete and are likely to be separate species. More evidence is awaited.

DISTRIBUTION: Oriental Region.

Bombus incertus Morawitz
incertus Morawitz, 1881:229

DISTRIBUTION: Palaearctic Region.

Bombus keriensis Morawitz
keriensis Morawitz, 1887:199, examined
separandus Vogt, 1909:61, examined
kohli Vogt, 1909:61, examined, not of Cockerell, 1906:75 (= B. morio (Swederus))
kozlovi Skorikov, 1910b:413, replacement name for kohli Vogt, 1909:61
tenellus Friese, 1913:86
[alagesianus (Skorikov, [1923]:152 [Lapidariobombus]) published without description]
alagesianus Reinig, 1930:89
pamirus (Skorikov, 1931:226 [Lapidariobombus]) not of Skorikov, 1931:232 [= B. oberti Morawitz]
richardsi Reinig, 1935:341, not of Frison, 1930:6 (= B. rufipes Lepeletier)
tibetensis Wang, 1982:439, replacement name for richardsi Reinig, 1935:341
trilineatus Wang, 1982:441, examined

TAXONOMIC STATUS: Several of these nominal taxa have been treated as separate species (e.g. Skorikov, 1931), although B. keriensis has also long been considered to be a broadly-distributed and variable species, including both yellow-banded and white-banded individuals throughout much of its range (Reinig, 1935, 1939; Williams, 1991 [pdf]).

The taxon alagesianus is morphologically closely similar to B. keriensis. Evidence from comparisons of a few COI barcodes is inconclusive at present. Until more evidence to the contrary is available from more detailed studies of patterns of variation, I shall continue to treat them as parts of a species-complex.

DISTRIBUTION: Oriental, Palaearctic Regions.

Bombus ladakhensis Richards
ladakhensis Richards, 1928a:336, examined, not infrasubspecific after Tkalcu, 1974b:335
phariensis Richards, 1930:642, examined, not infrasubspecific after Tkalcu, 1974b:336
variopictus Skorikov, 1933b:248, examined
reticulatus Bischoff, 1936:7, examined

DISTRIBUTION: Oriental Region, Palaearctic border.

Bombus miniatus Bingham
flavothoracicus Bingham, 1897:552, examined, not of Hoffer, 1889:49 (= B. campestris (Panzer))
miniatus Bingham, 1897:553, examined
eurythorax Wang, 1982:435, examined
stenothorax Wang, 1982:439, examined

TAXONOMIC STATUS: B. miniatus has been considered conspecific with B. pyrosoma, B. formosellus and B. friseanus (Williams, 1991 [pdf]).

Evidence of intermediates between B. miniatus and B. friseanus is not strong, but perhaps not least because so little material is available from where these taxa occur in close proximity in the eastern Himalaya. The few workers and males from this area that I have seen are difficult to assign to either taxon with any confidence, although the queens are closer to the colour pattern of B. miniatus (Williams, 1991 [pdf]). From COI barcodes, these taxa appear to remain discrete and are likely to be separate species. More evidence is awaited.

B. eurythorax and B. stenothorax are closely similar in morphology and colour pattern to B. miniatus. I know of no reason why these nominal taxa should not be considered conspecific.

NOMENCLATURE: With Psithyrus regarded as being a subgenus of the genus Bombus, B. flavothoracicus Bingham (1897) becomes a junior secondary homonym in Bombus of Psithyrus campestris var. flavothoracicus Hoffer (1889) (deemed to be subspecific, see ICZN, 1999: Article 45.6), and therefore B. flavothoracicus Bingham is invalid (ICZN, 1999: Article 57).

For this species, the oldest available name is B. miniatus, which becomes the valid name. The only subsequent publications of which I am aware that use the name B. flavothoracicus for this taxon as a species are by Tkalcu (1974b), Wang (1982) and Macior (1990), so this change of valid name is not a serious disruption of common usage.

DISTRIBUTION: Oriental Region.

Bombus pyrosoma Morawitz
pyrosoma Morawitz, 1890:349, examined
pyrrhosoma Dalla Torre, 1896:544, unjustified emendation
formosellus (Frison, 1934:163 [Bremus]) examined
wutaishanensis (Tkalcu, 1968a:39 [Pyrobombus]) examined

TAXONOMIC STATUS: B. pyrosoma has been considered conspecific with B. friseanus (Bischoff, 1936) and has been considered conspecific with B. formosellus, B. friseanus, and B. flavothoracicus (= B. miniatus) (Williams, 1991 [pdf]). From COI barcodes, these taxa appear to remain discrete and are likely to be separate species. More evidence is awaited.

DISTRIBUTION: Oriental Region, Palaearctic border.

Bombus richardsiellus (Tkalcu)
richardsiellus (Tkalcu, 1968a:42 [Pyrobombus]) examined

TAXONOMIC STATUS: From COI barcodes, this taxon appears to be discrete and is likely to be separate species. More evidence is awaited.

DISTRIBUTION: Oriental Region.

Bombus rufipes Lepeletier
rufipes Lepeletier, [1835]:473
richardsi (Frison, 1930:6 [Bremus])

DISTRIBUTION: Sumatran Region.